With Sorcery, you can only summon a spirit/demonling/demon with a vessel. So does the summoned critter have to own its own vessel, or can the sorcerer create the vessel for it?
Any vessel involved will be one that the spirit/whatever has, not created by the summoner. (House rules and/or future canon may have rules for sorcerers creating flawed pseudo-vessels.) “Random” summonings are assumed to call a being that already has a vessel (and some creature, such as demonlings, don’t need vessels on Earth). If a named being without a vessel is called on Earth, the summoning will fail. As always, the GM can allow these to work if special preparations are made!
